Features: *Locking Ball Ensures Secure Fit Sockets Snap-On Tightly & Won't Slip Off. *1/4-inch Hex Shank Prevents Stripping During High Speed Drill Operation. *Heat Treated Chrome Vanadium Steel for Normal & Impact. *Converts power drills into speedy socket drivers. *Applies to the screwdriver handle or electric screwdriver tools (hexagonal hole or three jaw chuck can be) *Driven sleeve is used, can be the original hexagonal side after installation on size into square size, which can be used for the installation of the sleeve, is a good accessories to convert Specification: *Material: Chrome Vanadium Steel *Color: Grey *Size: (approx.) 1/4" x 1/4" x 150mm--1/4 "shank can be converted into 6.35 mm square 3/8" x 1/4" x 150mm--1/4 "shank can be converted into 9.53 mm square 1/2" x 1/4" x 150mm--1/4 "shank can be converted into 12.7 mm square *Quantity: 1/3 pcs Package Includes: 1/3pcs x Hex Socket Adapter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.